| 摘要 |
A mechanism for stopping operation of a valve, comprising a plunger slidably mounted in a portion of a valve actuating system for actuating the valve, a stopper engageable and disengageable with the plunger to prevent or allow sliding motion of the plunger thereby operating or stopping the valve, and controlling means detecting phases of a valve actuating cam and operating an actuator for actuating the stopper in response to the detected phases, whereby the plunger and the stopper are engaged and disengaged always immediately after a lift of the cam ends. |
